знаете, кого

you know who

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phrase Rare #46,084
you know who Used to introduce a question about a person, often with emphasis or suspense. The comma reflects the pause in speech; кого is the accusative form of кто.
RU: Знаете, кого я встретил вчера?
EN: You know who I met yesterday?

Знаете, кого я там встретил?

Do you know who I met there?

Знаете, кого?

Do you know who?

— Не говори никому (2006)

Вы знаете, кого они арестовали?

Do you know who they arrested?